int geDrawingMode(int mode){
int last = libge_context->drawing_mode;
if(mode != libge_context->drawing_mode || mode & 0xF0000000){
if(mode & GE_DRAWING_MODE_2D){
glActiveTexture(GL_TEXTURE0);
glEnable(GL_TEXTURE_2D);
glDisable(GL_CULL_FACE);
glEnable(GL_ALPHA_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
geMatrixMode(GE_MATRIX_PROJECTION);
geLoadIdentity();
geOrthogonal(0.0, libge_context->width, libge_context->height, 0.0, -2049.0, 2049.0);
geMatrixMode(GE_MATRIX_VIEW);
geLoadIdentity();
geMatrixMode(GE_MATRIX_MODEL);
geLoadIdentity();
geMatrixMode(GE_MATRIX_MODELVIEW);
geLoadIdentity();
geMatrixMode(GE_MATRIX_TEXTURE0);
geLoadIdentity();
geUpdateMatrix();
if(mode & GE_DRAWING_2D_DEPTH){
glEnable(GL_DEPTH_TEST);
geClearMode(GE_CLEAR_COLOR_BUFFER | GE_CLEAR_DEPTH_BUFFER);
}else{
glDisable(GL_DEPTH_TEST);
geClearMode(GE_CLEAR_COLOR_BUFFER);
}
geShaderUse(_ge_GetVideoContext()->shader2d);
glActiveTexture(GL_TEXTURE0);
}
if(mode & GE_DRAWING_MODE_3D){
glEnable(GL_CULL_FACE);
glFrontFace(GL_CW);
glEnable(GL_DEPTH_TEST);
geClearMode(GE_CLEAR_COLOR_BUFFER | GE_CLEAR_DEPTH_BUFFER);
geMatrixMode(GE_MATRIX_PROJECTION);
geLoadIdentity();
if(libge_context->projection_matrix[0] == (float)0xFFFFFFFF){
gePerspective(60.0, (float)libge_context->width / (float)libge_context->height, 0.1, 100000.0);
}else{
geLoadMatrix(libge_context->projection_matrix);
}
}
}
libge_context->drawing_mode = mode;
return last;
}
static int clearMode(lua_State *L){
int argc = lua_gettop(L);
if(argc != 1) return luaL_error(L, "Argument error: screen.ClearMode(mode) takes one argument.");
geClearMode(luaL_checkint(L, 1));
return 0;
}
